content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * --------------------
   * RectangleAnchor.java
   * --------------------
   * (C) Copyright 2003-2012, by Object Refinery Limited.
   *
   * Original Author:  David Gilbert (for Object Refinery Limited);
   * Contributor(s):   -;
   *
   * Changes:
   * --------
   * 31-Oct-2003 (DG);
   * 01-Apr-2004 : Changed java.awt.geom.Dimension2D to org.jfree.ui.Size2D
   *               because of JDK bug 4976448 which persists on JDK 1.3.1 (DG);
   * 21-Jan-2005 : Changed return type of coordinates() method (DG);
   * 16-Jun-2012 : Moved from JCommon to JFreeChart (DG);
   *
   */
  
  package org.jfree.chart.ui;
  
  import java.awt.geom.Point2D;
  import java.awt.geom.Rectangle2D;
  
  /**
   * Used to indicate an anchor point for a rectangle.
   */
  public enum RectangleAnchor {
  
      /** Center. */
      CENTER("RectangleAnchor.CENTER"),
  
      /** Top. */
      TOP("RectangleAnchor.TOP"),
  
      /** Top-Left. */
      TOP_LEFT("RectangleAnchor.TOP_LEFT"),
  
      /** Top-Right. */
      TOP_RIGHT("RectangleAnchor.TOP_RIGHT"),
  
      /** Bottom. */
      BOTTOM("RectangleAnchor.BOTTOM"),
  
      /** Bottom-Left. */
      BOTTOM_LEFT("RectangleAnchor.BOTTOM_LEFT"),
  
      /** Bottom-Right. */
      BOTTOM_RIGHT("RectangleAnchor.BOTTOM_RIGHT"),
  
      /** Left. */
      LEFT("RectangleAnchor.LEFT"),
  
      /** Right. */
      RIGHT("RectangleAnchor.RIGHT");
  
      /** The name. */
      private String name;
  
      /**
       * Private constructor.
       *
       * @param name  the name.
       */
      private RectangleAnchor(final String name) {
          this.name = name;
      }
  
      /**
       * Returns a string representing the object.
       *
       * @return The string.
       */
      @Override
      public String toString() {
          return this.name;
      }
  
      /**
       * Returns the (x, y) coordinates of the specified anchor.
       *
       * @param rectangle  the rectangle.
       * @param anchor  the anchor.
       *
       * @return The (x, y) coordinates.
       */
      public static Point2D coordinates(final Rectangle2D rectangle,
                                        final RectangleAnchor anchor) {
          Point2D result = new Point2D.Double();
          if (anchor == RectangleAnchor.CENTER) {
              result.setLocation(rectangle.getCenterX(), rectangle.getCenterY());
          }
          else if (anchor == RectangleAnchor.TOP) {
              result.setLocation(rectangle.getCenterX(), rectangle.getMinY());
          }
          else if (anchor == RectangleAnchor.BOTTOM) {
              result.setLocation(rectangle.getCenterX(), rectangle.getMaxY());
          }
          else if (anchor == RectangleAnchor.LEFT) {
              result.setLocation(rectangle.getMinX(), rectangle.getCenterY());
          }
          else if (anchor == RectangleAnchor.RIGHT) {
              result.setLocation(rectangle.getMaxX(), rectangle.getCenterY());
          }
          else if (anchor == RectangleAnchor.TOP_LEFT) {
              result.setLocation(rectangle.getMinX(), rectangle.getMinY());
          }
          else if (anchor == RectangleAnchor.TOP_RIGHT) {
              result.setLocation(rectangle.getMaxX(), rectangle.getMinY());
          }
          else if (anchor == RectangleAnchor.BOTTOM_LEFT) {
              result.setLocation(rectangle.getMinX(), rectangle.getMaxY());
          }
          else if (anchor == RectangleAnchor.BOTTOM_RIGHT) {
              result.setLocation(rectangle.getMaxX(), rectangle.getMaxY());
          }
          return result;
      }
  
      /**
       * Creates a new rectangle with the specified dimensions that is aligned to
       * the given anchor point <code>(anchorX, anchorY)</code>.
       *
       * @param dimensions  the dimensions (<code>null</code> not permitted).
       * @param anchorX  the x-anchor.
       * @param anchorY  the y-anchor.
       * @param anchor  the anchor (<code>null</code> not permitted).
       *
       * @return A rectangle.
       */
      public static Rectangle2D createRectangle(final Size2D dimensions,
                                                final double anchorX,
                                                final double anchorY,
                                                final RectangleAnchor anchor) {
          Rectangle2D result = null;
          final double w = dimensions.getWidth();
          final double h = dimensions.getHeight();
          if (anchor == RectangleAnchor.CENTER) {
              result = new Rectangle2D.Double(
                  anchorX - w / 2.0, anchorY - h / 2.0, w, h
              );
          }
          else if (anchor == RectangleAnchor.TOP) {
              result = new Rectangle2D.Double(
                  anchorX - w / 2.0, anchorY - h / 2.0, w, h
              );
          }
          else if (anchor == RectangleAnchor.BOTTOM) {
              result = new Rectangle2D.Double(
                  anchorX - w / 2.0, anchorY - h / 2.0, w, h
              );
          }
          else if (anchor == RectangleAnchor.LEFT) {
              result = new Rectangle2D.Double(
                  anchorX, anchorY - h / 2.0, w, h
              );
          }
          else if (anchor == RectangleAnchor.RIGHT) {
              result = new Rectangle2D.Double(
                  anchorX - w, anchorY - h / 2.0, w, h
              );
          }
          else if (anchor == RectangleAnchor.TOP_LEFT) {
              result = new Rectangle2D.Double(
                  anchorX - w / 2.0, anchorY - h / 2.0, w, h
              );
          }
          else if (anchor == RectangleAnchor.TOP_RIGHT) {
              result = new Rectangle2D.Double(
                  anchorX - w / 2.0, anchorY - h / 2.0, w, h
              );
          }
          else if (anchor == RectangleAnchor.BOTTOM_LEFT) {
              result = new Rectangle2D.Double(
                  anchorX - w / 2.0, anchorY - h / 2.0, w, h
              );
          }
          else if (anchor == RectangleAnchor.BOTTOM_RIGHT) {
              result = new Rectangle2D.Double(
                  anchorX - w / 2.0, anchorY - h / 2.0, w, h
              );
          }
          return result;
      }
  
  }
  